[ek-so-stoh-sis, -suh-] 
[-seez] . Pathology. | the abnormal formation of a bony growth on a bone or tooth. |
| ex·os·to·sis (ěk'sŏ-stō'sĭs) n. pl. ex·os·to·ses (-sēz) A bony growth on the surface of a bone or tooth. [Greek exostōsis : ex-, out of; see exo- + osteon, bone; see ost- in Indo-European roots + -ōsis, -osis.] |
exostosis ex·os·to·sis (ěk'sŏ-stō'sĭs)
n. pl. -ses (-sēz)
A projection that is capped by cartilage and arises from a bone that develops from cartilage. Also called hyperostosis, poroma.
exostosis
solitary benign tumour that consists partly of cartilage and partly of bone. Osteochondromas are common and may develop spontaneously following trauma or may have a hereditary basis. No treatment is required unless the tumour interferes with function, in which case it should be surgically removed. Rarely, a solitary osteochondroma will become malignant in adulthood, giving rise to a chondrosarcoma.
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sɒˈstoʊ